LXR linux/drivers/media/video/saa7185.c

   1/*
   2 * saa7185 - Philips SAA7185B video encoder driver version 0.0.3
   3 *
   4 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   5 *
   6 * Slight changes for video timing and attachment output by
   7 * Wolfgang Scherr <scherr@net4you.net>
   8 *
   9 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  10 *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  11 *
  12 * This program is free software; you can redistribute it and/or modify
  13 * it under the terms of the GNU General Public License as published by
  14 * the Free Software Foundation; either version 2 of the License, or
  15 * (at your option) any later version.
  16 *
  17 * This program is distributed in the hope that it will be useful,
  18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 * GNU General Public License for more details.
  21 *
  22 * You should have received a copy of the GNU General Public License
  23 * along with this program; if not, write to the Free Software
  24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25 */
  26
  27#include <linux/module.h>
  28#include <linux/types.h>
  29#include <linux/slab.h>
  30#include <linux/ioctl.h>
  31#include <asm/uaccess.h>
  32#include <linux/i2c.h>
  33#include <linux/videodev2.h>
  34#include <media/v4l2-device.h>
  35#include <media/v4l2-chip-ident.h>
  36
  37MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
  38MODULE_AUTHOR("Dave Perks");
  39MODULE_LICENSE("GPL");
  40
  41static int debug;
  42module_param(debug, int, 0);
  43MODULE_PARM_DESC(debug, "Debug level (0-1)");
  44
  45
  46/* ----------------------------------------------------------------------- */
  47
  48struct saa7185 {
  49        struct v4l2_subdev sd;
  50        unsigned char reg[128];
  51
  52        v4l2_std_id norm;
  53};
  54
  55static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
  56{
  57        return container_of(sd, struct saa7185, sd);
  58}
  59
  60/* ----------------------------------------------------------------------- */
  61
  62static inline int saa7185_read(struct v4l2_subdev *sd)
  63{
  64        struct i2c_client *client = v4l2_get_subdevdata(sd);
  65
  66        return i2c_smbus_read_byte(client);
  67}
  68
  69static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  70{
  71        struct i2c_client *client = v4l2_get_subdevdata(sd);
  72        struct saa7185 *encoder = to_saa7185(sd);
  73
  74        v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
  75        encoder->reg[reg] = value;
  76        return i2c_smbus_write_byte_data(client, reg, value);
  77}
  78
  79static int saa7185_write_block(struct v4l2_subdev *sd,
  80                const u8 *data, unsigned int len)
  81{
  82        struct i2c_client *client = v4l2_get_subdevdata(sd);
  83        struct saa7185 *encoder = to_saa7185(sd);
  84        int ret = -1;
  85        u8 reg;
  86
  87        /* the adv7175 has an autoincrement function, use it if
  88         * the adapter understands raw I2C */
  89        if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  90                /* do raw I2C, not smbus compatible */
  91                u8 block_data[32];
  92                int block_len;
  93
  94                while (len >= 2) {
  95                        block_len = 0;
  96                        block_data[block_len++] = reg = data[0];
  97                        do {
  98                                block_data[block_len++] =
  99                                    encoder->reg[reg++] = data[1];
 100                                len -= 2;
 101                                data += 2;
 102                        } while (len >= 2 && data[0] == reg && block_len < 32);
 103                        ret = i2c_master_send(client, block_data, block_len);
 104                        if (ret < 0)
 105                                break;
 106                }
 107        } else {
 108                /* do some slow I2C emulation kind of thing */
 109                while (len >= 2) {
 110                        reg = *data++;
 111                        ret = saa7185_write(sd, reg, *data++);
 112                        if (ret < 0)
 113                                break;
 114                        len -= 2;
 115                }
 116        }
 117
 118        return ret;
 119}
 120
 121/* ----------------------------------------------------------------------- */
 122
 123static const unsigned char init_common[] = {
 124        0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 125                                 * YUV2C=1, MY2C=1, MUV2C=1 */
 126
 127        0x42, 0x6b,             /* OVLY0=107 */
 128        0x43, 0x00,             /* OVLU0=0     white */
 129        0x44, 0x00,             /* OVLV0=0   */
 130        0x45, 0x22,             /* OVLY1=34  */
 131        0x46, 0xac,             /* OVLU1=172   yellow */
 132        0x47, 0x0e,             /* OVLV1=14  */
 133        0x48, 0x03,             /* OVLY2=3   */
 134        0x49, 0x1d,             /* OVLU2=29    cyan */
 135        0x4a, 0xac,             /* OVLV2=172 */
 136        0x4b, 0xf0,             /* OVLY3=240 */
 137        0x4c, 0xc8,             /* OVLU3=200   green */
 138        0x4d, 0xb9,             /* OVLV3=185 */
 139        0x4e, 0xd4,             /* OVLY4=212 */
 140        0x4f, 0x38,             /* OVLU4=56    magenta */
 141        0x50, 0x47,             /* OVLV4=71  */
 142        0x51, 0xc1,             /* OVLY5=193 */
 143        0x52, 0xe3,             /* OVLU5=227   red */
 144        0x53, 0x54,             /* OVLV5=84  */
 145        0x54, 0xa3,             /* OVLY6=163 */
 146        0x55, 0x54,             /* OVLU6=84    blue */
 147        0x56, 0xf2,             /* OVLV6=242 */
 148        0x57, 0x90,             /* OVLY7=144 */
 149        0x58, 0x00,             /* OVLU7=0     black */
 150        0x59, 0x00,             /* OVLV7=0   */
 151
 152        0x5a, 0x00,             /* CHPS=0    */
 153        0x5b, 0x76,             /* GAINU=118 */
 154        0x5c, 0xa5,             /* GAINV=165 */
 155        0x5d, 0x3c,             /* BLCKL=60  */
 156        0x5e, 0x3a,             /* BLNNL=58  */
 157        0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 158        0x60, 0x00,             /* NULL      */
 159
 160        /* 0x61 - 0x66 set according to norm */
 161
 162        0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 163        0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 164        0x69, 0x00,             /* 0 : caption 1st byte even field */
 165        0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 166
 167        0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 168        0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 169                                 * CBLF=0, ORCV2=0, PRCV2=0 */
 170        0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 171
 172        0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 173                                 * least for PAL */
 174        0x6f, 0x00,             /* HTRIG upper bits */
 175        0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 176
 177        /* The following should not be needed */
 178
 179        0x71, 0x15,             /* BMRQ=0x115 */
 180        0x72, 0x90,             /* EMRQ=0x690 */
 181        0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 182        0x74, 0x00,             /* NULL       */
 183        0x75, 0x00,             /* NULL       */
 184        0x76, 0x00,             /* NULL       */
 185        0x77, 0x15,             /* BRCV=0x115 */
 186        0x78, 0x90,             /* ERCV=0x690 */
 187        0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 188
 189        /* Field length controls */
 190
 191        0x7a, 0x70,             /* FLC=0 */
 192
 193        /* The following should not be needed if SBLN = 1 */
 194
 195        0x7b, 0x16,             /* FAL=22 */
 196        0x7c, 0x35,             /* LAL=244 */
 197        0x7d, 0x20,             /* LAL=244, FAL=22 */
 198};
 199
 200static const unsigned char init_pal[] = {
 201        0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 202                                 * YGS=1, INPI=0, DOWN=0 */
 203        0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 204        0x63, 0xcb,             /* FSC0 */
 205        0x64, 0x8a,             /* FSC1 */
 206        0x65, 0x09,             /* FSC2 */
 207        0x66, 0x2a,             /* FSC3 */
 208};
 209
 210static const unsigned char init_ntsc[] = {
 211        0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 212                                 * YGS=1, INPI=0, DOWN=0 */
 213        0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 214        0x63, 0x1f,             /* FSC0 */
 215        0x64, 0x7c,             /* FSC1 */
 216        0x65, 0xf0,             /* FSC2 */
 217        0x66, 0x21,             /* FSC3 */
 218};
 219
 220
 221static int saa7185_init(struct v4l2_subdev *sd, u32 val)
 222{
 223        struct saa7185 *encoder = to_saa7185(sd);
 224
 225        saa7185_write_block(sd, init_common, sizeof(init_common));
 226        if (encoder->norm & V4L2_STD_NTSC)
 227                saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 228        else
 229                saa7185_write_block(sd, init_pal, sizeof(init_pal));
 230        return 0;
 231}
 232
 233static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 234{
 235        struct saa7185 *encoder = to_saa7185(sd);
 236
 237        if (std & V4L2_STD_NTSC)
 238                saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 239        else if (std & V4L2_STD_PAL)
 240                saa7185_write_block(sd, init_pal, sizeof(init_pal));
 241        else
 242                return -EINVAL;
 243        encoder->norm = std;
 244        return 0;
 245}
 246
 247static int saa7185_s_routing(struct v4l2_subdev *sd,
 248                             u32 input, u32 output, u32 config)
 249{
 250        struct saa7185 *encoder = to_saa7185(sd);
 251
 252        /* RJ: input = 0: input is from SA7111
 253         input = 1: input is from ZR36060 */
 254
 255        switch (input) {
 256        case 0:
 257                /* turn off colorbar */
 258                saa7185_write(sd, 0x3a, 0x0f);
 259                /* Switch RTCE to 1 */
 260                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 261                saa7185_write(sd, 0x6e, 0x01);
 262                break;
 263
 264        case 1:
 265                /* turn off colorbar */
 266                saa7185_write(sd, 0x3a, 0x0f);
 267                /* Switch RTCE to 0 */
 268                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
 269                /* SW: a slight sync problem... */
 270                saa7185_write(sd, 0x6e, 0x00);
 271                break;
 272
 273        case 2:
 274                /* turn on colorbar */
 275                saa7185_write(sd, 0x3a, 0x8f);
 276                /* Switch RTCE to 0 */
 277                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 278                /* SW: a slight sync problem... */
 279                saa7185_write(sd, 0x6e, 0x01);
 280                break;
 281
 282        default:
 283                return -EINVAL;
 284        }
 285        return 0;
 286}
 287
 288static int saa7185_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 289{
 290        struct i2c_client *client = v4l2_get_subdevdata(sd);
 291
 292        return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7185, 0);
 293}
 294
 295/* ----------------------------------------------------------------------- */
 296
 297static const struct v4l2_subdev_core_ops saa7185_core_ops = {
 298        .g_chip_ident = saa7185_g_chip_ident,
 299        .init = saa7185_init,
 300};
 301
 302static const struct v4l2_subdev_video_ops saa7185_video_ops = {
 303        .s_std_output = saa7185_s_std_output,
 304        .s_routing = saa7185_s_routing,
 305};
 306
 307static const struct v4l2_subdev_ops saa7185_ops = {
 308        .core = &saa7185_core_ops,
 309        .video = &saa7185_video_ops,
 310};
 311
 312
 313/* ----------------------------------------------------------------------- */
 314
 315static int saa7185_probe(struct i2c_client *client,
 316                        const struct i2c_device_id *id)
 317{
 318        int i;
 319        struct saa7185 *encoder;
 320        struct v4l2_subdev *sd;
 321
 322        /* Check if the adapter supports the needed features */
 323        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 324                return -ENODEV;
 325
 326        v4l_info(client, "chip found @ 0x%x (%s)\n",
 327                        client->addr << 1, client->adapter->name);
 328
 329        encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 330        if (encoder == NULL)
 331                return -ENOMEM;
 332        encoder->norm = V4L2_STD_NTSC;
 333        sd = &encoder->sd;
 334        v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
 335
 336        i = saa7185_write_block(sd, init_common, sizeof(init_common));
 337        if (i >= 0)
 338                i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 339        if (i < 0)
 340                v4l2_dbg(1, debug, sd, "init error %d\n", i);
 341        else
 342                v4l2_dbg(1, debug, sd, "revision 0x%x\n",
 343                                saa7185_read(sd) >> 5);
 344        return 0;
 345}
 346
 347static int saa7185_remove(struct i2c_client *client)
 348{
 349        struct v4l2_subdev *sd = i2c_get_clientdata(client);
 350        struct saa7185 *encoder = to_saa7185(sd);
 351
 352        v4l2_device_unregister_subdev(sd);
 353        /* SW: output off is active */
 354        saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
 355        kfree(encoder);
 356        return 0;
 357}
 358
 359/* ----------------------------------------------------------------------- */
 360
 361static const struct i2c_device_id saa7185_id[] = {
 362        { "saa7185", 0 },
 363        { }
 364};
 365MODULE_DEVICE_TABLE(i2c, saa7185_id);
 366
 367static struct i2c_driver saa7185_driver = {
 368        .driver = {
 369                .owner  = THIS_MODULE,
 370                .name   = "saa7185",
 371        },
 372        .probe          = saa7185_probe,
 373        .remove         = saa7185_remove,
 374        .id_table       = saa7185_id,
 375};
 376
 377static __init int init_saa7185(void)
 378{
 379        return i2c_add_driver(&saa7185_driver);
 380}
 381
 382static __exit void exit_saa7185(void)
 383{
 384        i2c_del_driver(&saa7185_driver);
 385}
 386
 387module_init(init_saa7185);
 388module_exit(exit_saa7185);
 389